<!DOCTYPE html>
<html lang="zh-CN">
    <head>
        <meta charset="UTF-8" />
        <title>test</title>
    </head>
    <body>
        <!-- ../变成了html文件夹 
             ../img 找到了img文件夹
        -->
        <img src="../img/cxk.jpg">
    </body>
</html>